c. Except as provided in Section 4(d), with respect to unscheduled maintenance, the costs of which are not covered by
warranty or insurance, Lessee and Lessor shall proportionately share the costs of such maintenance based upon the number of Flight Hours that each has used the Aircraft (including for the purposes of this Section 7(c) any Flight Hours flown by
Lessor and Lessee prior to the commencement of this Agreement). 

 d. With respect to the costs of compliance with any airworthiness
directive applicable to the Aircraft, Lessee shall bear the costs of such compliance if the cost of such compliance does not exceed $50,000. If the cost of such compliance exceeds $50,000, Lessee and Lessor shall each bear 50% of the total cost of
the compliance with such airworthiness directive. 

  


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